REMOVE

1. trees
2. roads
3. Lake Louise, Alberta, Canada

WHAT

1. exterior views (1)
2. forests (plant communitie … (1)
3. landscapes (representatio … (1)
4. mountains (1)
5. railroad stations (1)
6. railroads (1)
7. silver gelatin (1)
8. utility poles (1)

WHO

1. Clyfford Still; Still, Cl … (1)
2. Still, Clyfford (1)

WHEN

1. 1920 (1)
2. 1945 (1)
3. between circa 1929 and ci … (1)